/*
 * @(#)ShellSet.java	1.0 Apr 26, 2008
 *
 *	The MIT License
 *
 *	Copyright (c) 2008 Malachi de AElfweald <malachid@gmail.com>
 *
 *	Permission is hereby granted, free of charge, to any person obtaining a copy
 *	of this software and associated documentation files (the "Software"), to deal
 *	in the Software without restriction, including without limitation the rights
 *	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *	copies of the Software, and to permit persons to whom the Software is
 *	furnished to do so, subject to the following conditions:
 *
 *	The above copyright notice and this permission notice shall be included in
 *	all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *	THE SOFTWARE.
 */
package org.eoti.io.console.shell.cmd;

import org.eoti.io.console.shell.ShellException;
import org.eoti.io.console.shell.ShellExtension;
import org.eoti.util.StringUtil;

import java.util.*;

public class ShellSet
	extends ShellExtension
{
	public ShellSet()
	{
		super();
	}

	protected void computeFormat()
	{
		int col1 = 0;
		int col2 = 0;
		for(String key : shell.getEnvironment().keySet())
			col1 = Math.max(col1, key.length());

		col2 = getConsoleWidth() - col1 - 5;
		setFormat("  " + defaultFormat(col1) + ":  " + defaultFormat(col2) + "\n");
	}

	public void execute(List<String> arguments)
			throws ShellException
	{
		computeFormat();
		if(arguments.isEmpty())
		{
			for(String key : shell.getEnvironment().keySet())
				format(key, shell.getEnv(key));			

			return;
		}
		String environKey = arguments.remove(0);
		if(arguments.isEmpty())
		{
			format(environKey, shell.getEnv(environKey));
		}else{
			shell.setEnv(environKey, StringUtil.join(arguments, " "));
		}
	}

	public String getName(){
		return "set";
	}
}
